Jules Haag
Jules Haag was a French mathematician and horologist.Haag matriculated at l'École Normale Supérieure in 1903 and successfully qualified for the agrégation of mathematics in 1906. He received in 1910 his doctorate in mathematics from the University of Paris with dissertation Families de Lamé, composées de surfaces égales: généralisations, applications under the supervision of Gaston Darboux.
Haag was professor of mathématiques spéciales at the lycée of Douai from 1906 to 1908. At the science faculty of Clermont-Ferrand, he became in 1910 maître de conférences in astronomy and in 1910 professor of rational mechanics.
During WWI, Haag worked in French marine artillery center in Gavres.
Haag was an Invited Speaker of the ICM in 1924 at Toronto and in 1932 at Zurich.
